Non-contact identification of bridge deflection based on network camera

doi:10.6052/j.issn.1000-4750.2021.03.0221

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Non-contact identification of bridge deflection based on network camera
	Zhu, Qian-Kun 1,2; Cui, De-Peng 2; Du, Yong-Feng 1,2
刊名	Gongcheng Lixue/Engineering Mechanics
	2022-06-01
卷号	39 期号:6 页码:146-155
关键词	Color matching Deflection (structures) Errors Frequency domain analysis Template matching Acquisition equipments Bridge deflection Contacts identification Hue values Lightemitting diode Machine-vision Network cameras Non-contact Real time monitoring Real time monitors
ISSN号	1000-4750
DOI	10.6052/j.issn.1000-4750.2021.03.0221
英文摘要	A non-contact identification system of bridge deflection based on network cameras is established to solve the problem of poor accessibility, of low efficiency, and of incompetence in all-weather real-time monitoring of the traditional bridge deflection identification system. The system used LED (light-emitting diode) lights as the marker and took network cameras as the acquisition equipment to transmit the image information wirelessly, the deflection time history information of the target is obtained by using the computer carries HSV (hue, saturation, and value) based on fast template matching and color tracking (cvCamShift) based on geometric matching algorithm, and then the non-contact identification of bridge deflection can be realized. The feasibility of the system is verified by the vibration tests under four working conditions on the footbridge model and the field test of a real bridge. The results show that: in the model test, the error of the time domain and of the frequency domain information identified by the system compared with the laser displacement sensor is less than 0.6%, and the error can still be less than 0.7% under the interference of fog. Under the real bridge test, the error of the system identification results is less than 1.9% compared with the bridge deflection instrument. This indicates that the system has strong robustness and good economy and has a wide application prospect. Copyright ©2022 Engineering Mechanics. All rights reserved.
语种	中文
出版者	Tsinghua University
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/158449]
专题	土木工程学院
作者单位	1.International Research Base on Seismic Mitigation and Isolation of Gansu Province, Lanzhou University of Technology, Lanzhou; 730050, China 2.Institute of Earthquake Protection and Disaster Mitigation, Lanzhou University of Technology, Lanzhou; 730050, China;
推荐引用方式 GB/T 7714	Zhu, Qian-Kun,Cui, De-Peng,Du, Yong-Feng. Non-contact identification of bridge deflection based on network camera[J]. Gongcheng Lixue/Engineering Mechanics,2022,39(6):146-155.
APA	Zhu, Qian-Kun,Cui, De-Peng,&Du, Yong-Feng.(2022).Non-contact identification of bridge deflection based on network camera.Gongcheng Lixue/Engineering Mechanics,39(6),146-155.
MLA	Zhu, Qian-Kun,et al."Non-contact identification of bridge deflection based on network camera".Gongcheng Lixue/Engineering Mechanics 39.6(2022):146-155.